UNB UNT parameters

Hello everyone, I have a question regarding the UNB and UNT parameters, the models that I have designed is a 40-story steel structures. one model  is only beams and columns and the other have core and outriggers at the top. is it important to assign UNB and UNT to carry on the design? I attached pictures as well as the staad files for the models

   8540.Model 1.STDModel 3.STD